Install xserver-xorg-video-nouveau by entering the following commands in the terminal:
sudo apt update sudo apt install xserver-xorg-video-nouveau
Description:
X.Org X server -- Nouveau display driver
This driver for the X.Org X server (see xserver-xorg for a further description) provides support for NVIDIA Riva, TNT, GeForce, and Quadro cards. . This package provides 2D support including EXA acceleration, Xv and RandR. 3D functionality is provided by the libgl1-mesa-dri package. . This package is built from the FreeDesktop.org xf86-video-nouveau driver.
Homepage: https://nouveau.freedesktop.org/wiki/
Version: 1:1.0.15-2
Section: x11